032-4995 – Mazon TWP – Grand Ridge Road over West Fork of Mazon River
0.50 miles east of Tynan Road (41.24259N, 88.361377W)

032-5115 – Maine TWP – Jugtown Road over East Fork of Mazon River
0.71 miles south of Braceville Road (41.21867N, 88.321697W)

Note: No State (except for Cty/Twsp road bridges over Interstate) or Municipal bridges are included on this list. Call the Grundy County Highway Department (815) 942-0363 if you require more information.